Sudoku solvers online - Sudoku 25x25 solver

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This is the Sudoku 25x25.

Rules:

Every row and every column shall contain all letters A to Y (no duplicates).
The 25 squares shall contain all letters A to Y (no duplicates).

The solver will always find a solution if it exists. If you press 'Solve', the solver will indicate that there is no solution, one solution, or more than one solution. Do not press 'Solve' too soon, because then the solver may be busy for a long time.